Scheme of Work Cambridge International as & a level

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bio scheme of work

Extension activity: Learners investigate the terms ‘slow-’ and ‘fast-twitch’ muscle fibres.

15.2 Control and coordination in plants

KC2

KC5

15.2.1 Describe the rapid response of the Venus fly trap to stimulation of hairs on the lobes of modified leaves and explain how the closure of the trap is achieved.

15.2.2 Explain the role of auxin in elongation growth by stimulating proton pumping to acidify cell walls.

15.2.3 Describe the role of gibberellin in the germination of barley (see 16.3.4).

Show time-lapse videos of plants that have observable responses to stimuli: https://plantsinmotion.bio.indiana.edu/plantmotion/movements/nastic/nastic.html.

Learners compile a list of similarities between communication in flowering plants and in mammals by comparing chemical communication in plants and animals. Present comparisons as a table or use a table to plan and then write out comparisons using examples.

Host a whole-class activity in which one learner makes a statement about the role of gibberellin in the germination of barley and is followed by the next. The first learner states the first event occurring in the mechanism, and then chooses the next member of the group to continue the ‘story’.

Prepare a crossword containing clues for words related to the content of recent lessons on control and coordination. Learners undertake the activity in pairs. Learners highlight the key terms that they had most difficulty in remembering by underlining them or using coloured markers for future reference. (F)

Past and specimen papers

Past/specimen papers and mark schemes are available to download at www.cambridgeinternational.org/support (F)

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